feat(cli): add archive command for cross-host data transport (#610)

* feat(cli): add archive command for cross-host data transport
* fix(archive): correct flat-layout path and entry-count wording
* refactor(archive): rename BuildArchive to WriteArchive

browser/chromium/archive.go

@@ -0,0 +1,64 @@
+package chromium
+
+import (
+	"path"
+	"path/filepath"
+
+	"github.com/moond4rk/hackbrowserdata/types"
+	"github.com/moond4rk/hackbrowserdata/utils/fileutil"
+)
+
+// ArchiveSource is one decryption-relevant file or directory plus its path inside the browser's
+// User Data tree (forward-slash), so an archive can be re-expanded into a working profile layout.
+type ArchiveSource struct {
+	AbsPath   string
+	LayoutRel string
+	IsDir     bool
+}
+
+// installationFiles live at the User Data root (shared across profiles); archived for fidelity even
+// though keys.json-based restore does not read them.
+var installationFiles = []string{"Local State"}
+
+// ArchiveSources lists the files an archive must capture for the given categories: the User Data root
+// files (Local State), every resolved category source per profile, plus each profile's Preferences
+// marker so a restore can rediscover the profile. LayoutRel is forward-slash, relative to the root.
+func (b *Browser) ArchiveSources(categories []types.Category) []ArchiveSource {
+	var out []ArchiveSource
+	for _, name := range installationFiles {
+		abs := filepath.Join(b.cfg.UserDataDir, name)
+		if fileutil.FileExists(abs) {
+			out = append(out, ArchiveSource{AbsPath: abs, LayoutRel: name, IsDir: false})
+		}
+	}
+	for _, p := range b.profiles {
+		// Flat-layout installs hold data directly under UserDataDir (profileDir == root); skip the
+		// basename so the archive matches the real layout instead of inserting a phantom level.
+		profileRel := ""
+		if p.profileDir != b.cfg.UserDataDir {
+			profileRel = filepath.Base(p.profileDir)
+		}
+		for _, marker := range profileMarkers {
+			abs := filepath.Join(p.profileDir, marker)
+			if fileutil.FileExists(abs) {
+				out = append(out, ArchiveSource{
+					AbsPath:   abs,
+					LayoutRel: path.Join(profileRel, marker),
+					IsDir:     false,
+				})
+			}
+		}
+		for _, cat := range categories {
+			rp, ok := p.sourcePaths[cat]
+			if !ok {
+				continue
+			}
+			out = append(out, ArchiveSource{
+				AbsPath:   rp.absPath,
+				LayoutRel: path.Join(profileRel, rp.rel),
+				IsDir:     rp.isDir,
+			})
+		}
+	}
+	return out
+}